Kernel: futex: forbid uaddr == uaddr2 in futex_wait_requeue_pi()
Published May 26, 2014
4.9
MEDIUMCVSS 2.0
EPSS 0.38%
Description
The futex_wait_requeue_pi function in kernel/futex.c in the Linux kernel before 3.5.1 does not ensure that calls have two different futex addresses, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted FUTEX_WAIT_REQUEUE_PI command.
Affected products
No data.
- ≤ 3.4.9
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.0.10
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- 3.0.12
- 3.0.13
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- 3.0.15
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- 3.0.18
- 3.0.19
- 3.0.20
- 3.0.21
- 3.0.22
- 3.0.23
- 3.0.24
- 3.0.25
- 3.0.26
- 3.0.27
- 3.0.28
- 3.0.29
- 3.0.30
- 3.0.31
- 3.0.32
- 3.0.33
- 3.0.34
- 3.0.35
- 3.0.36
- 3.0.37
- 3.0.38
- 3.0.39
- 3.0.40
- 3.0.41
- 3.0.42
- 3.0.43
- 3.0.44
- 3.0.45
- 3.0.46
- 3.0.47
- 3.0.48
- 3.0.49
- 3.0.50
- 3.0.51
- 3.0.52
- 3.0.53
- 3.0.54
- 3.0.55
- 3.0.56
- 3.0.57
- 3.0.58
- 3.0.59
- 3.0.60
- 3.0.61
- 3.0.62
- 3.0.63
- 3.0.64
- 3.0.65
- 3.0.66
- 3.0.67
- 3.0.68
- 3.1
- 3.1
- 3.1
- 3.1
- 3.1
- 3.1.1
- 3.1.2
- 3.1.3
- 3.1.4
- 3.1.5
- 3.1.6
- 3.1.7
- 3.1.8
- 3.1.9
- 3.1.10
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.2.8
- 3.2.9
- 3.2.10
- 3.2.11
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- 3.2.13
- 3.2.14
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- 3.2.16
- 3.2.17
- 3.2.18
- 3.2.19
- 3.2.20
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- 3.2.22
- 3.2.23
- 3.2.24
- 3.2.25
- 3.2.26
- 3.2.27
- 3.2.28
- 3.2.29
- 3.2.30
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.3.5
- 3.3.6
- 3.3.7
- 3.3.8
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.4.6
- 3.4.7
- 3.4.8
- 3.4.10
- 3.4.11
- 3.4.12
- 3.4.13
- 3.4.14
- 3.4.15
- 3.4.16
- 3.4.17
- 3.4.18
- 3.4.19
- 3.4.20
- 3.4.21
- 3.4.22
- 3.4.23
- 3.4.24
- 3.4.25
- 3.4.26
- 3.4.27
- 3.4.28
- 3.4.29
- 3.4.30
- 3.4.31
- 3.4.32
- 3.4.33
- 3.4.34
- 3.4.35
- 3.4.36
- 3.4.37
- 3.4.38
- 3.4.39
- 3.4.40
- 3.4.41
- 3.4.42
- 3.4.43
- 3.4.44
- 3.4.45
- 3.4.46
- 3.4.47
- 3.4.48
- 3.4.49
- 3.4.50
- 3.4.51
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- 3.4.55
- 3.4.56
- 3.4.57
- 3.4.58
- 3.4.59
- 3.4.60
- 3.4.61
- 3.4.62
- 3.4.63
- 3.4.64
- 3.4.65
- 3.4.66
- 3.4.67
- 3.4.68
- 3.4.69
- 3.4.70
- 3.4.71
- 3.4.72
- 3.4.73
- 3.4.74
- 3.4.75
- 3.4.76
- 3.4.77
- 3.4.78
- 3.4.79
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-431.23.3.el6
Fixed · RHSA-2014:0981
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-431.23.3.el6 | Fixed | RHSA-2014:0981 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5 and 7, and Red Hat Enterprise MRG 2.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.38% (0.00381) | 29.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00381) | 29.63th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00047) | 11.71th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 13, 2023 | 0.95% (0.00950) | 31.86th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.03% (0.01034) | 40.96th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
References (8)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6f7b0a2a5c0fb03be7c25bd1745baa50582348ef x_refsource_CONFIRM
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.5.1 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2014/05/14/9 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2012-6647 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1097746 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/6f7b0a2a5c0fb03be7c25bd1745baa50582348ef x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2012-6647
- https://www.cve.org/CVERecord?id=CVE-2012-6647
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6f7b0a2a5c0fb03be7c25bd1745baa50582348ef | x_refsource_CONFIRM | |
| http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.5.1 | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2014/05/14/9 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2012-6647 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1097746 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/6f7b0a2a5c0fb03be7c25bd1745baa50582348ef | x_refsource_CONFIRM | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-6647 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-6647 |
Change history (0)
No recorded changes yet.